How are your drives configured? FAB3 has been known to have issues with some firewire and other external configurations (even external configurations not directly involving the drives). Review this link: FAB Won't Run
You can skip to the end and see the solution (or compromise). There are a lot of things you can try there as well. A lot of suggestions you'll get will probably be repeats of what was given there, so why wait? Besides, it saves everyone the time of re-typing it all. Let everybody know your configuration and equipment too. And yes, it helps a lot if you give a blow-by-blow description of what happened when you try different suggestions.
Try to be patient and objective. I understand your frustration.
This should not be your posture toward DVD FAB3xxx.
But neither should your posture be this :a !